[Melanoma (part 1)].

Melanoma is a tumor most often found in the skin, developed at the expense of tumor melanocytes. Its incidence doubles every 10 years in France. There are intrinsic and extrinsic risk factors (mainly UV exposure). If a clinical diagnosis is suspected, treatment consists of initial resection without margins, followed by resection of the margins according to the Breslow index. A sentinel lymph node may be included in the revision margin, depending on the Breslow index, the patient's general condition and age. An extension assessment will be carried out depending on the stage of the melanoma operated on.